US9716455B2 - Power conversion device and method of controlling the same - Google Patents
Power conversion device and method of controlling the same Download PDFInfo
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- US9716455B2 US9716455B2 US14/680,656 US201514680656A US9716455B2 US 9716455 B2 US9716455 B2 US 9716455B2 US 201514680656 A US201514680656 A US 201514680656A US 9716455 B2 US9716455 B2 US 9716455B2
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- direct current
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- electric machine
- rotating electric
- power
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims description 23
- 239000004065 semiconductor Substances 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 38
- 238000004804 winding Methods 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 description 21
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000007858 starting material Substances 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/029—Restarting, e.g. after power failure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/18—Estimation of position or speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
Definitions
- the present invention relates to a power conversion device which enables a stable start of a rotating electric machine, such as an alternating current motor or an alternating current generator, and to a method of controlling the power conversion device.
- FIG. 5 is a diagram showing a heretofore known technology described in JP-A-11-75394.
- 101 is a direct current power source
- 102 is a three-phase voltage source inverter formed of semiconductor switching elements and free wheel diodes
- M is a permanent magnet synchronous motor
- 103 is a current detector
- 104 is a current detector gain
- 105 is a phase-number conversion section
- 106 is a restart from idling control section
- 107 is a coordinate conversion section
- 108 is a magnetic pole position estimation section
- 109 is a speed computation section
- 110 is a current control section
- 111 is a gate signal switching section.
- a so-called position and speed senseless power conversion device shown in FIG. 5 enables a smooth restart of the inverter 102 in a kind of case in which a rotor is running idle, and an induced voltage is generated in the stator winding of the synchronous motor M, in a condition in which the inverter 102 is stopped and no voltage is applied to the synchronous motor M.
- the restart from idling control section 106 detects a condition, in which the inverter 102 is stopped and the current of the synchronous motor M is zero, from two phase components i ⁇ and i ⁇ of a winding current output from the phase-number conversion section 105 .
- the restart from idling control section 106 generates a kind of gate signal which turns on at least one of the semiconductor switching elements of the inverter 102 , and switches the gate signal switching section 111 to the restart from idling control section 106 side using a switching control signal s, the one switching element is turned on, and at least one phase of the stator winding of the synchronous motor M is short-circuited.
- the restart from idling control section 106 operates so as to short-circuit the stator winding of the synchronous motor M and cause the short circuit current due to the induced voltage to flow. Further, the magnetic pole position estimation section 108 and the speed computation section 109 compute a magnetic pole position ⁇ and a rotating speed ⁇ from the short circuit current at this time, and the current control section 110 generates an initial value of a current command or the like, and controls the inverter 102 , thereby executing a restart of the device.
- the direct current voltage of the inverter 102 is insufficient when an anomaly occurs in, for example, the direct current power source 101 in this kind of power conversion device, and after that, the power conversion device is restarted, or when the commercial power source is interrupted by a stroke of lightning or the like (including an instantaneous power interruption) in a system including a rectifier power source, into which a commercial power source and a rectifier circuit are combined, in place of the direct current power source 101 , and after that, the system is restarted.
- JP-A-2007-17026 (Paragraphs [0024] to [0028] and FIG. 2 or the like) describes a heretofore known technology wherein a first power converter, which rectifies a commercial power source voltage and converts the rectified voltage to a direct current voltage, and a second power converter, which drives a synchronous motor with a gas engine, thus causing the synchronous motor to operate as a generator, and converts a voltage output therefrom to a direct current voltage, are connected to a common direct current bus bar, and the direct current voltage of a direct current intermediate circuit is converted to an alternating current voltage by a third power converter, and supplied to an auxiliary machine, such as a motor.
- FIG. 6 is a diagram showing the heretofore known technology described in JP-A-2007-17026.
- 201 is a commercial power source
- 202 is a first power converter having a diode rectifier circuit 203 , an electrolytic capacitor 204 , and the like
- 205 is a second power converter (a PWM converter) to the alternating current terminals of which a synchronous motor M is connected and which shares a direct current bus bar with the first power converter 202
- 206 is a gas engine which drives the synchronous motor M
- 207 is a voltage detector
- 208 is a current detector.
- 209 is a main controller
- 210 is a computing device
- 211 is a drive circuit
- 212 is a motor controller
- 213 is a third power converter (an inverter) connected in parallel to the first and second power converters 202 and 205
- 214 is an auxiliary machine, such as a motor, which is driven by the power converter 213
- 215 is a DC/DC converter
- 216 is a charging control device
- 217 is an electrical storage device
- 218 is a starter motor control circuit
- 219 is a starter motor for the gas engine 206 .
- the generated power is converted to direct current power by the power converter 205 , supplied to the power converter 213 , and converted to an alternating current voltage, thus driving the auxiliary machine 214 .
- a surplus of the direct current power is input into the DC/DC converter 215 , and converted to a predetermined level of direct current voltage, with which the electrical storage device 217 is charged by the charging control device 216 .
- the power of the electrical storage device 217 is used to drive the starter motor 219 via the starter motor control circuit 218 .
- the heretofore described operation enables an efficient operation of the auxiliary machine 214 in accordance with an operation condition of the gas engine 206 .
- the rotating speed of the synchronous motor M (that is, the rotating speed of the gas engine 206 ) in FIG. 6 can be detected by the same principle as in JP-A-11-75394. That is, when a lower-arm switching element of one phase of the power converter 205 is turned on, and in the event that an induced voltage (which shall be synonymous with a terminal voltage by ignoring internal resistance) of the synchronous motor M in the one phase is higher than in any other phase, a short circuit current flows via a lower-arm free wheel diode of a phase with a low induced voltage.
- a period in which the short circuit current flows is a period of an electrical angel of 120 degrees wherein the induced voltage in the phase, the switching element of which is turned on, is higher than in any other phase, it is possible to detect the rotating speed based on a time for which the short circuit current flows or does not flow.
- the short circuit current flows uncontrollably at an unexpected timing, meaning that the short circuit current cannot be distinguished from a short circuit current caused to flow by intentionally turning on a switching element when detecting the speed. Therefore, there has been the problem that it is difficult to accurately detect the rotating speed of the synchronous motor M, or it is not possible to detect the rotating speed, the problem of a failure in starting due to a false detection of the speed, the problem that it is not possible to stably start the synchronous motor M, or the like.
- a problem to be solved by the invention is to provide a power conversion device wherein it is possible to accurately detect the speed of a rotating electric machine and stably start the rotating electric machine even when the direct current voltage of a power conversion section, such as an inverter section, is lower than the induced voltage of the rotating electric machine, and a method of controlling the power conversion device.
- a power conversion device is directed to a power conversion device including a power conversion section which can alternately convert between direct current power and alternating current power by turning on and off a plurality of bridge-connected semiconductor switching elements to each of which a free wheel diode is connected in reverse parallel; and a rotating electric machine, such as an alternating current generator or an alternating current motor, which is connected to the alternating current terminals of the power conversion section.
- an operation of detecting the speed of the rotating electric machine is executed in a condition in which the direct current voltage of the power conversion section is boosted to equal to or more than the specified value by intermittently turning on and off at least one of the plurality of semiconductor switching elements of the power conversion section.
- an operation of detecting the speed of the alternating current generator is executed in a condition in which the direct current voltage of the power conversion section is boosted to equal to or higher than the induced voltage by intermittently turning on and off at least one of the plurality of semiconductor switching elements of the power conversion section.
- an operation of detecting the speed of the alternating current motor is executed in a condition in which the direct current voltage of the power conversion section is boosted to equal to or higher than the induced voltage by intermittently turning on and off at least one of the plurality of semiconductor switching elements of the power conversion section.
- a commercial power source is provided; and a converter section which converts the alternating current power of the commercial power source to direct current power, wherein the positive and negative output terminals of the converter section are connected one to each end of a capacitor connected between the direct current terminals of the power conversion section.
- power supply terminals are connected one to each end of the capacitor, thus supplying a power source to an external load from the power supply terminals.
- a capacitor is connected between the direct current terminals of the power conversion section, and power supply terminals are connected one to each end of the capacitor, thus supplying a power source to an external load from the power supply terminals.
- an operation of boosting the direct current voltage of the power conversion section to equal to or more than the specified value is carried out by simultaneously and intermittently turning on and off all semiconductor switching elements, of the plurality of semiconductor switching elements configuring the power conversion section, which configure the upper arms or lower arms of the power conversion section.
- the speed detection operation of the rotating electric machine is an operation of, when at least one of the plurality of semiconductor switching elements of the power conversion section is turned on, detecting the rotating speed of the rotating electric machine based on a period of conduction of a short circuit current flowing back through the one switching element and the stator winding of the rotating electric machine.
- the direct current voltage of a power conversion section such as an inverter section
- the direct current voltage is boosted by a switching operation of the power conversion section, thereby enabling the subsequent speed detection operation, and it is thus possible to stably start the rotating electric machine.
- a standby power supply device such as an auxiliary power supply or a battery, it is possible to reduce the size and price of the whole of the device.
- FIG. 1 is a configuration diagram of a power conversion device according to a preferred embodiment of the invention.
- FIG. 2 is a function block diagram of a control device of an inverter section in FIG. 1 .
- FIG. 3 is a flow chart showing an operation of the preferred embodiment of the invention.
- FIG. 4A and FIG. 4B illustrate operation when boosting by turning on and off an upper-arm switching element in the preferred embodiment of the invention.
- FIG. 5 is an overall configuration diagram of a heretofore known technology described in JP-A-11-75394.
- FIG. 6 is an overall configuration diagram of a heretofore known technology described in JP-A-2007-17026.
- FIG. 1 is a configuration diagram of a power conversion device according to the preferred embodiment of the invention.
- 10 is a three-phase commercial power source, and the commercial power source 10 is connected to the alternating current input terminals of a converter section 20 acting as a bridge rectifier circuit formed of diodes 21 to 26 .
- a charging resistor 31 and a capacitor 33 are connected in series between the direct current output terminals of the converter section 20 .
- the two ends of the charging resistor 31 can be short-circuited by a switch 32 .
- the charging resistor 31 , switch 32 , and capacitor 33 configure a direct current intermediate circuit 30 .
- Power supply terminals 70 are connected one to each end of the capacitor 33 , and the power supply terminals 70 are for supplying direct current power source to an external load (not shown) as necessary.
- the direct current terminals of an inverter section 40 formed of bridge-connected semiconductor switching elements 41 to 46 , to each of which a free wheel diode is connected in reverse parallel, are connected one to each end of the capacitor 33 .
- 40 u is a U-phase arm formed of the switching elements 41 and 44
- 40 v is a V-phase arm formed of the switching elements 42 and 45
- 40 w is a W-phase arm formed of the switching elements 43 and 46 .
- a rotating electric machine 50 is connected to the alternating current terminals of the individual phase arms 40 u , 40 v , and 40 w , and a drive source or load 60 is linked to the rotor of the rotating electric machine 50 .
- the rotating electric machine 50 is an alternating current generator or alternating current motor, such as a permanent magnet synchronous motor (generator), and the drive source or load 60 is a drive source, such as an engine, or a rotating load driven by the rotating electric machine 50 .
- the permanent magnet synchronous motor acting as the rotating electric machine 50 is caused to operate as a generator by the drive source 60 such as an engine.
- 81 is a voltage detector which detects a direct current intermediate voltage (the voltage of the capacitor 33 ), and 82 is a current detector which detects the current of the stator winding of the rotating electric machine 50 .
- FIG. 2 is a function block diagram of a control device of the inverter section 40 in FIG. 1 .
- the control device 90 includes voltage comparison means which compares the direct current intermediate voltage detected by the voltage detector 81 with a specified value, current comparison means 93 which compares the current detected by the current detector 82 with a specified value, computation control means 91 which executes a speed detection process, or the like, based on results of the comparisons by the voltage comparison means 92 and current comparison means 93 and on a time measured by a timer, and gate signal generation means 94 which generates a gate signal for a predetermined switching element of the inverter section 40 in accordance with a result of computation by the computation control means 91 .
- a direct current intermediate voltage is detected by the voltage detector 81 (step S 1 ), and the detected direct current intermediate voltage is compared with the specified value by the voltage comparison means (step S 2 ).
- the specified value is set to a value greater than the induced voltage of the rotating electric machine 50 .
- step S 2 Yes When the direct current intermediate voltage is equal to or more than the specified value (step S 2 Yes), no reflux current (no short circuit current of the stator winding of the rotating electric machine 50 ) passing through the free wheel diodes in the inverter section 40 and the capacitor 33 flows due to the induced voltage of the rotating electric machine 50 . Consequently, the computation control means 91 executes the speed detection process (step S 3 ) and detects the position of the magnetic poles, and the rotating speed, of the rotating electric machine 50 . That is, the computation control means 91 determines a switching element in the inverter section 40 which should be turned on, and the gate signal generation means 94 generates a gate signal in accordance with information from the determination.
- stator winding of the rotating electric machine 50 is short-circuited via a turned-on phase switching element and a free wheel diode of another phase, meaning that it is possible, using the method previously described in JP-A-11-75394, JP-A-2007-17026, or the like, to detect the rotating speed based on a period in which a short circuit current flows or on a time for which no short circuit current flows.
- step S 2 No when the direct current intermediate voltage is less than the specified value due to an interruption of the commercial power source 10 or the like (step S 2 No), the computation control means 91 determines whether or not a time measured by the internal timer indicates that a first specified time T 1 has elapsed from when starting (step S 4 ). If the specified time T 1 has elapsed (step S 4 Yes), it is presumed that the direct current intermediate voltage has reached equal to or more than the specified value by a boost operation of the inverter section 40 , to be described hereafter, in the specified time T 1 , meaning that the step moves to the speed detection process (step S 3 ).
- step S 4 No If the specified time T 1 has not elapsed from when starting (step S 4 No), the lower-arm switching elements (the switching elements connected to the negative side direct current terminal of the inverter section 40 ) 44 , 45 , and 46 of the U-phase arm 40 u , V-phase arm 40 v , and W-phase arm 40 w of the inverter section 40 are all turned on (step S 5 ). Further, after a second specified time T 2 shorter than the first specified time T 1 has elapsed (step S 6 ), the switching elements 44 , 45 , and 46 are all turned off (step S 7 ).
- the capacitor 33 As energy accumulated in the inductance component of the rotating electric machine 50 is emitted into the capacitor 33 via the upper-arm free wheel diodes by the operation of intermittently turning on and off the switching elements in the way heretofore described, the capacitor 33 is charged. By so doing, it is possible to boost the direct current intermediate voltage.
- step S 8 the direct current intermediate voltage and the current are detected by the voltage detector 81 and the current detector 82 (step S 9 ).
- step S 9 the direct current intermediate voltage reaches equal to or more than the specified value by the boost operation in the steps S 5 to S 7 (step S 10 Yes)
- step S 3 the step moves to the speed detection process
- step S 10 No when the detected direct current intermediate voltage is still less than the specified value (step S 10 No), it is determined again whether or not the first specified time T 1 has elapsed from when starting (step S 11 ). If the specified time T 1 has elapsed (step S 11 Yes), it is presumed that the direct current intermediate voltage has reached equal to or more than the specified value by the boost operation in the steps S 5 to S 7 , meaning that the step moves to the speed detection process (step S 3 ).
- step S 11 No If the specified time T 1 has not elapsed from when starting (step S 11 No), the process in and after the step S 1 is executed on condition that the current flowing through the rotating electric machine 50 is equal to or less than a specified value equivalent to an overcurrent (step S 12 Yes), and when the direct current intermediate voltage exceeds the specified value (step S 12 No), no more boost operation is carried out, and the process in and after the step S 8 is repeatedly executed.
- the starting of the rotating electric machine 50 is carried out. By so doing, it is possible to accurately detect the speed of the rotating electric machine 50 and stably start the rotating electric machine 50 even when the direct current voltage of the inverter section 40 is lower than the induced voltage of the rotating electric machine 50 .
- the boost operation is carried out by simultaneously and intermittently turning on and off all the lower-arm switching elements 44 , 45 , and 46 of the three-phase inverter section 40 , but all the upper-arm switching elements 41 , 42 , and 43 may be simultaneously and intermittently turned on and off. Alternatively, not only all the upper-arm or lower-arm switching elements, but at least one of the switching elements 41 to 46 configuring the inverter section 40 may be intermittently turned on and off.
- FIG. 4A and FIG. 4B illustrate operation when carrying out a boost operation by intermittently turning on and off, for example, only the V-phase upper-arm switching element 42 .
- the other switching elements shall be turned off.
- the boost operation of the capacitor 33 is possible by intermittently turning on and off at least one switching element, of the switching elements configuring the inverter section.
- the power conversion device including the converter section which converts the alternating current voltage of the commercial power source 10 to a direct current voltage.
- the invention can also be utilized as a self-contained power supply device which converts the alternating current output voltage of the generator, which is the rotating electric machine 50 , to a direct current voltage with the inverter section 40 and supplies the direct current voltage across the capacitor 33 to an external load as a power source.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2013089138 | 2013-04-22 | ||
JP2013-089138 | 2013-04-22 | ||
PCT/JP2014/060049 WO2014175046A1 (ja) | 2013-04-22 | 2014-04-07 | 電力変換装置及びその制御方法 |
Related Parent Applications (1)
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PCT/JP2014/060049 Continuation WO2014175046A1 (ja) | 2013-04-22 | 2014-04-07 | 電力変換装置及びその制御方法 |
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US20150214876A1 US20150214876A1 (en) | 2015-07-30 |
US9716455B2 true US9716455B2 (en) | 2017-07-25 |
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US14/680,656 Active US9716455B2 (en) | 2013-04-22 | 2015-04-07 | Power conversion device and method of controlling the same |
Country Status (5)
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US (1) | US9716455B2 (de) |
EP (1) | EP2991219B1 (de) |
JP (1) | JP5967299B2 (de) |
CN (1) | CN104718695B (de) |
WO (1) | WO2014175046A1 (de) |
Families Citing this family (13)
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JP6200457B2 (ja) * | 2015-06-29 | 2017-09-20 | ファナック株式会社 | 初期充電回路の異常発熱を検出する手段を有するモータ駆動装置 |
JP6677176B2 (ja) * | 2017-01-11 | 2020-04-08 | 株式会社デンソー | 電力変換回路の制御装置、回転電機ユニット |
CN107093966A (zh) * | 2017-03-29 | 2017-08-25 | 杭州阔博科技有限公司 | 一种应用于高速电机驱动控制器的无位置控制电路 |
EP3644493B1 (de) * | 2017-06-21 | 2023-04-26 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Thyristorstartvorrichtung |
CN107769655B (zh) * | 2017-11-06 | 2020-02-28 | 广东美的暖通设备有限公司 | 永磁同步电机转速估算方法、装置、计算设备及存储介质 |
CN111869095A (zh) * | 2018-03-23 | 2020-10-30 | 三菱电机株式会社 | 电动机驱动装置、电动送风机、电动吸尘器及干手器 |
JP6922846B2 (ja) * | 2018-05-24 | 2021-08-18 | 株式会社オートネットワーク技術研究所 | 車載用の電源装置 |
WO2020044544A1 (ja) * | 2018-08-31 | 2020-03-05 | 本田技研工業株式会社 | インバータ式発動発電機 |
DE102018218449A1 (de) * | 2018-10-29 | 2020-04-30 | Robert Bosch Gmbh | Berührungssicherheit für funkentstörte Spannungswandler in einem potentialfreien Gleichspannungsnetz |
US11764585B2 (en) * | 2018-10-29 | 2023-09-19 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Wind power generation system and power conversion apparatus |
JP7100562B2 (ja) * | 2018-11-05 | 2022-07-13 | 株式会社Soken | 駆動システム |
EP3663872B1 (de) * | 2018-12-06 | 2022-06-08 | The Swatch Group Research and Development Ltd | Steuerungsverfahren für einen gleichstromelektromotor |
SE544612C2 (en) * | 2019-05-07 | 2022-09-20 | Bombardier Transp Gmbh | A method of determining the position of a freely rotating rotor in a permanent magnet motor, and a control ciruit and a system therefore |
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2014
- 2014-04-07 WO PCT/JP2014/060049 patent/WO2014175046A1/ja active Application Filing
- 2014-04-07 CN CN201480002659.9A patent/CN104718695B/zh active Active
- 2014-04-07 JP JP2015513657A patent/JP5967299B2/ja active Active
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Also Published As
Publication number | Publication date |
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CN104718695B (zh) | 2017-07-21 |
EP2991219B1 (de) | 2020-11-04 |
US20150214876A1 (en) | 2015-07-30 |
CN104718695A (zh) | 2015-06-17 |
EP2991219A4 (de) | 2017-01-04 |
JP5967299B2 (ja) | 2016-08-10 |
JPWO2014175046A1 (ja) | 2017-02-23 |
EP2991219A1 (de) | 2016-03-02 |
WO2014175046A1 (ja) | 2014-10-30 |
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